"Through a Tanzanian case study, this paper challenges the claim, along with the statistics that support it, that self-employment is the dominant employment status in the informal economy. The paper begins by reviewing key insights from relevant literature on the informal economy to argue that conventional notions of ‘wage employment’ and ‘self-employment’, while unfit for capturing the nature and variety of employment relations in developing countries, remain central to the design of surveys on the workforce therein. After putting statistics on Tanzania’s informal economy and labour force into context, the analysis reviews the type of wage employment relationships that can be found in one instance of the informal economy in urban Tanzania. The paper scrutinises how key employment categories have been translated from English into Swahili, how the translation biases respondents’ answers towards the term ‘self-employment’, and how this, in turn, leads to the statistical invisibility of wage labour in the informal economy. The paper also looks at the consequences of this ‘statistical tragedy’ and at the dangers of conflating varied forms of employment, including wage labour, that differ markedly in their modes of operation and growth potential. Attention is also paid to the trade-offs faced by policymakers in designing better labour force surveys."